Add .asf.yaml (CASSANDRA-18969)

 https://cwiki.apache.org/confluence/display/INFRA/Git+-+.asf.yaml+features

.asf.yaml

@@ -0,0 +1,19 @@
+notifications:
+  commits:      commits@cassandra.apache.org
+  issues:       commits@cassandra.apache.org
+  pullrequests: pr@cassandra.apache.org
+
+github:
+  description: "Java Driver for Apache Cassandra®"
+  homepage: https://cassandra.apache.org/
+  enabled_merge_buttons:
+    squash:  false
+    merge:   false
+    rebase:  true
+  features:
+    wiki: false
+    issues: false
+    projects: false
+
+notifications:
+  jira_options: link worklog

README.md

@@ -96,7 +96,7 @@ See the [Cassandra error handling done right blog](https://www.datastax.com/blog
 
 ## License
 
-© DataStax, Inc.
+© The Apache Software Foundation
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -112,9 +112,6 @@ limitations under the License.
 
 ----
 
-DataStax is a registered trademark of DataStax, Inc. and its subsidiaries in the United States 
-and/or other countries.
-
 Apache Cassandra, Apache, Tomcat, Lucene, Solr, Hadoop, Spark, TinkerPop, and Cassandra are 
 trademarks of the [Apache Software Foundation](http://www.apache.org/) or its subsidiaries in
 Canada, the United States and/or other countries.